Fluid-operable flue-cleaner.



P, J. DARLINGTON. FLUID OPERABLE- FLUE CLEANER.

APPLHCKTION FILEb JULY 12, I912- Patented Aug. 17, 1915.

. arsenic;

. rnrnrr a. nnnnrn'e'ron, or nlnn'rnonn, connnorrcu'r.

To all 10.7mm it may concern p Be it" known that L-PrnLn? J. mam.

' iron, acitizen of the United States, residing at Hartford, in the county of Hartford and State of Connecticut, have inventedcertain. new and useful Improvements in Fluid-91 erable Flue-Cleaners, of which the follow ing is a specification.-

' This invention relates towhat I'shall. for

Convenience term a. I fluid' operable [flue cleaner, the obj ectof the invention being to which to enable those skilled in the art to practice the same will be fully set forth in the following description, the novelty of the invention being defined by the claims following said description. From this it will be clear that I do not restrict myself to such lis a longitudinal sectionalviewof the nia-' disclosure; 1 may depart therefrom .in sev- 'eral respectsjwithin the scope of tion set forth in said claims. I

Referring to said drawings: Figure 1 is an elevation of a flue cleaner involving my invention. Fig. 2 'is 'a' transverse section through the pawl mechanism. Fig; 3 v is' a plan iew of the centering head, and,"Fig.-

the inven chine. a

Like characters refer to like parts throughout the several figures of the drawings. t

' My device comprises a part cylindrical and part. spherical frame 1 formed with a 'transversereylindricalbore, one portion 2 of said bore being of large diameter and the other portion 3 of small diameter, the. two portions forming an internal shoulder 4 where they join. 1 A lining 5 screwed'intothe bore portion- 2-issecured therein by a screw thread 6 against a shoulder. 5'is formed withan integral outer end wall 8 having holes 9 to receive a wrench for screw-u ing it inor out.

' I Specification of rn-ornnsnnn rnun-cnnannn.

. A cylindrical plunger 10 is formed of two diameters/the large diameter sliding freely in' 'the lining 5 and the small diameter sliding freely in the small cylinder bore portion v3, there .being a shoulder 11 at'the juncture of, the two portions-of said bore. 'A stem 12 is secured into'the plunger 10 by a na ratent. Patented na 3 33,1915,- Application filed-113137 12,1912. Serial n 709,015.

\ taper 'screw'thread ,13 and extends beyond 7 the plunger at' both ends, and through end wall- 8 being supported thereby. Where stem 12 passes through end wall 8, 'there is a renewable'bush 14: with flange 15 at the r inner end to preventjitf blowing out. The

small diameter bore portion 3'inframe 1 is made with a'.renewable bush 16 having a flange 17 vat its inner 1 end to preventitsblowing out? A rearwardly extending longitudinal cylindrical. extension 18 of frame I 1 is formed'with an internal screw thread- 19 to receive the motive fluid supply pipe and with an admission chamber 20. mission passage 21 communicates from chamber to an annular pressure space 22' between shoulder 4: of'f'rame 1 and shoulder. 11 of plunger lO'whereby the motive fluid pressure exerts/a continuous efiort to drive plunger 10 inward. .As plunger 10 moves plunger 10. shoulder l and admit -mo-' tivefluid to longitudinal admission ports '24 formed in plunger 10 and communicat- :ing 'to' space behind the large end of plunger 10, thereby driving the plunger outward with a force proportioned to the Anad inward radial admission ports 23 formed in greater cross-area of space 25 than of an- ,nular-space 22. The plunger now moves 7 forward until the large end of plunger 10 has uncovered radial cross r'exhaust ports 26 formed in lining 5 and communicating with V an' annular exhaust space 27 formed in the -'bore of frame 1, which in turn normally communicates with outside air through a longitudinalexhaust port28 concentrically formed in a forwardly extending longitudi-.

nal cylindrical extension 29. of frame. 1. While moving outward, the radial admission,"

- ports 23 have p ssed shoulder- 4 thereby cutting ofi'the'a "ssion space 25. This cutting off of admission together with the uncovering of the exhaust opening reduces the in space 25 until the plunger is 1 pressure again forced inward by the pressure in space 22, thereby completing one cycle of operation. The stem 12 constitutes a convenient hammer member. The resulting action is a rapid vibration'of plunger 10 transversely through frame 1, the ends of stem 12 striking hammer blows upon the inner surface of the tube being cleaned and accomplishing the purpose of the device. A dowel pin headed in admission chamber 20 passes through the front wall thereof and into lining 5 to prevent it accidentally screwing out, said dowel pin being held axially in place by the fluid pressure. A check valve 31 in longitudinal exhaust port 28 is ar-- v ference of head 32 or the diameter of the tube to be cleaned.

Fingers are .guided by and float. between parallel ribs 36 formed on the rear face of centering head 32. Adjustable nuts 37 secure cross-yoke 33 on eye-bolts 34 and adjust the position of cross-yoke 33 axially close to check valve 31 when the check valve is closed and fingers 35 seated on the face of head 32 and projecting beyond the radius of the tube to be cleaned. It will be noted that the stem of the valve 31 is rigidly connected with the cross yoke 33. Spiral springs'38 yieldingly support cross yoke 33, eye-bolts 34 and fingers 35 in the position shown in Fig. 4 when. the device is outside'the'tube to be cleaned. Grooves 39 with sides fitting against the flat side faces of the nuts 37 prevent accidental unscrewing from vibration. A thin shell 40 covers over the front'face of centering head 32 and protects yoke 33 and check valve 31 from soot or dirt. Shell 40 has exhaust openings or holes 41 to allow the exhaust fluid to esca .Blow are formed through ead 32 an blow passages'43 are formed in eye-bolts 34 to assist in blowing away soot or dirtiwhioh might accumulate between fingers 35*and the-rear face of head 32. Bolts 44 secure shell 40 in a centering on the front face of-hea'd32.

Adouble flanged ring 45 is secured on and concentrically with rear extens1on 18 of frame 1. Ring 45 is. of slightly less diameter than the inside. of the tube to be cleaned. Ro1lers46 are longitudinally piyoted between the flanges of ring 45 and are assages. 42'

ing it and the enter freely. 1 I I What I claim-is:

free to rotate on their pivots 47. Rollers 46 reach to a radius slightly less than the tion, from the radius through the pivot and with their outer ends yieldingly held at a circumference greater than the inside diameter of the tube to be cleaned,'by spiral springs 49 with the heels of pawls 48 resting against the hub and between the flanges of ring 45. In order to further secure dowel pin 30, apipe bushing 50 carrying a crosspin 51 is screwed into thread 19 crosspin 51 bearing against the head of dowel pin 30.

The action of the device is as follows: When pushed into the tube to be cleaned, the end of the tube forces back and inward the outer tips of fingers 35, tipping them up on their heels and drawing backward eye-bolts 34 cross-yoke 33 and lifting check valve 31, against pressure of the fluid, from its seat, uncovering the exhaust opening and starting the plunger operating with the ends of the stem striking the inner wall of the tube. The reaction causes the main body of the machine tovibrate and hence a slight transverse movement of the device in the tube. The pawls 48 allow free'rotary movement in one direction but resist it in the. other, thereby translating this transverse movement into a rotary movement to turn the device in the tube. On removal of the device from thetube, releasing the outer ends of'fingers 35 from radial restraint, the combined action of springs 38 and fluid pressure behind check valve 31 return fingers 35 to their original position and move forward yoke 33 allowing check valve 31 to close and stopping plunger by shutting off its exhaust. When starting the device into a tube, plunger 10 and stem 12 will normally drop down into an extreme position of the stroke which would not otherwise allow the device to enter the tube, but as centering head 32 is forward of fingers .35, and fingers 35 are forward of stem 12, the result is that in entering a tube the device is first centered with the tube and supported at the forward end by head 32, then the fingers 35 enter the tube, starting the plunger 10 into operation which carries stem 12. back and forth across the entrance to the tube allow- 1 A hammer. comprising "a rotary body,

a hammer member supported-thereby, means for operating the hammer member, and means for positively preventing rotation remainder of the device to I LJEOAIQ i.

in one direction only of the body while in In testimony whereof I aflix my signature I a, tub;. ,h b. d h in presence of two witnesses. 2. ne ammer a, rotary 0 y a. ammer member, means 61 operating said. hammer PHILIP L T 5 member, and pawl mechanism for prevent- Witnesses:

ing the rotation in one direction only of said E. ANDERSON,

body while in a tube or flue. 1 JOSEPH R. BARLow. 

